Long-term performance of a fiber-reinforced polymer slab bridge superstructure-field load test and ratings

This paper presents calibration of service temperature on the prediction of long-term performance of GFRP bar in reinforced concrete structures. Two approaches, based on monthly average temperature and yearly average temperature are proposed to simulate the real service condition on the RC structure for the study on long-term performance. A design example for the comparison of results by the two approaches is presented.

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An Investigation of Environmental Reduction Factor for GFRP Bar Used as Concrete Reinforcement in China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.413.399 ◽

2011 ◽

Vol 413 ◽

pp. 399-403 ◽

Cited By ~ 1

Author(s):

Jian Wei Huang

Keyword(s):

Reduction Factor ◽

Fiber Reinforced Polymer ◽

Rc Structures ◽

Average Temperature ◽

Reinforced Polymer ◽

Gfrp Bar ◽

Temperature Records ◽

Long Term Performance ◽

Term Performance

Currently, an environmental reduction factor (ERF) is incorporated in design codes/guidelines of Fiber Reinforced-Polymer (FRP) in reinforced concrete (RC) structures to account for the FRP long-term durability. Due to the lack of real time durability data, justification of the ERF is still necessitated. This paper presents a calibration of ERF for GFRP bar to be used in China on the basis of the prediction of GFRP long-term performance with monthly average temperature records from 32 major cities. Research results show that the ERF values vary from 0.49 to 0.58 at 100% R.H. exposure, while ERFs are greater than 0.70 for all cases being studied when R.H. is below 90%. On the basis of this study, ERF can be recommended as of 0.70 and 0.50 for application with R.H. <90% and moisture saturated exposures, respectively.

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Effects of Adhesive Coating on the Hygrothermal Aging Performance of Pultruded CFRP Plates

Polymers ◽

10.3390/polym12020491 ◽

2020 ◽

Vol 12 (2) ◽

pp. 491

Author(s):

Xinkai Hao ◽

Guijun Xian ◽

Xiangyu Huang ◽

Meiyin Xin ◽

Haijuan Shen

Keyword(s):

Alkaline Solution ◽

Fiber Reinforced Polymer ◽

Absorption Mechanism ◽

Reinforced Polymer ◽

Long Term Performance ◽

Term Performance ◽

Positive Effect ◽

Adhesive Coating ◽

Temperature Water

Bonding of carbon fiber reinforced polymer (CFRP) plates to a concrete member is a widely used strengthening method. CFRP plates used in construction degrade due to harsh environmental conditions such as high temperature or alkaline solution seepage from concrete. However, the adhesive between CFRP plates and concrete may have a positive effect on the durability performance of CFRP plates. In this paper, the long-term performance of both naked and adhesive coated CFRP pultruded plates subjected to different-temperature water or alkaline solution (20, 40 and 60 °C) are investigated to evaluate the protective effect of adhesive on CFRP plates. It is found that the adhesive coating can slow the deterioration of mechanical properties especially the tensile properties and fiber-matrix interfacial properties. The water absorption mechanism of CFRP plates was also investigated.

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